package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 借助spring boot提供的工具类DigestUtils中的MD5加密方法加密密码
//        password=DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            //注意这里比对的是加密后的密码
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO employee){

        Employee emp=new Employee();

        //使用spring提供的工具类拷贝属性，注意目标属性需要同名
        BeanUtils.copyProperties(employee,emp);
        emp.setStatus(StatusConstant.ENABLE);

        //新员工密码设置为初始密码
        String password=DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes());
        emp.setPassword(password);

//        //设置时间信息
//        emp.setCreateTime(LocalDateTime.now());
//        emp.setUpdateTime(LocalDateTime.now());
//
//        //使用threadLocal存储当前ID
//        emp.setCreateUser(BaseContext.getCurrentId());
//        emp.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(emp);

    }

    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO){

        //直接利用pagehelper分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> pageResult= employeeMapper.page(employeePageQueryDTO);

        //包装一个page result的对象
        long total=pageResult.getTotal();
        List<Employee> employeeList=pageResult.getResult();

        return new PageResult(total,employeeList);
    }

    @Override
    public void obey(Integer status, Long id){

        Employee employee=new Employee();

        employee.setStatus(status);
        employee.setId(id);

        //这实际上是一个更新操作
        employeeMapper.update(employee);

    }

    @Override
    public void update(EmployeeDTO employeeDTO){

        Employee employee=new Employee();

        BeanUtils.copyProperties(employeeDTO,employee);
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);

    }

    @Override
    public Employee queryByID(Long id){

        Employee employee= employeeMapper.queryByID(id);
        //注意保密性
        employee.setPassword("****");
        return employee;
    }

}
